: The files must be placed on a USB drive formatted to exFAT .
: 21265 is Build 21265 of software version 3.4. 21265 l4 l15t4.rar
: Discussions and files for these updates are frequently hosted on community platforms like CyanLabs or the Ford F150 Forum. Usage Instructions (General Overview) If you are trying to use this file to update a vehicle: : The files must be placed on a USB drive formatted to exFAT